Gas-mixer



(No Model.) 1 S G. J. ROBERTS.

GAS'MIXER. No. 502,531. Patented Aug. 1, 1893.

WITNESSES: S INVENTOB NITED STATES GEORGE J. ROBERTS, OF DAYTON, OHIO.

GAS-MIXER.

SPECIFICATION forming part of Letters Patent No. 502,531, dated August1, 1893. Application filed March 6, 1893. Serial No. 464,847. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, GEORGE J. ROBERTS, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Gas-Mixers; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to improvements in gas mixers.

The object of the invention is to produce a mixer wherein a perfectadjustment of the parts through which the gas is discharged to themixing point is had, and therebya greater or less quantity is emittedwith a minimum degree of resistance in either case.

The peculiarities of my invention will be set forth in thespecification. 1

For a detailed description, reference is had to the drawings forming apart of this specication, the same letters denoting the same partstherein.

Figure 1. is a vertical longitudinal section of my improved gas mixer.Fig. 2. is a side elevation of the same; Fig. 3. a plan view of thefunnel, with the adjustable nozzle re moved; Fig. 4. a detached detailview of the plug or valve; Fig. 5. a detached detail view of the nozzle.

A description of the specific parts is as follows: A denotes aninclosing part or casting formed after the fashion of abell or invertedfunnel, having at its diverging end screwthreads a adapted to engagewith similar threads on the pipe leading to the place of consumption andat the other end, a transverse bar I) integral therewith. This bar isprovidedwitha central circularopeningadapt ed to receive vertically thenozzle B and to abut against the flanged part c of said nozzle. Thisnozzle is provided with screw threads on its lower extremity designed toengage with the pipe leading from the main or reservoir of supply. Thisnozzle is, as is usually the case with all gas nozzles, the port ofdischarge, but its construct-ion is adapted-to the purposes of myinvention, and is therefore thought to be dissimilar to other devicesfor similar purposes. There is a central longitudinal opening d in thisnozzle, a portion of which is tapped to receive the plug e, andpartially screwthreaded to engage with the screwthreads on the lower endof the plug. The screw threadson these parts may be dispensed with, andthe longitudinal surface of said plug, and the opening in the nozzle, be

made smooth; making these parts, however, adapted to engage by means ofscrewthreads, as shown, is thought to be preferable, as all liability ofthe plug becoming displaced is avoided. The plug 6 is constructed justabove the screw threads, with a smooth portion or ring, that retains thewidest diameter of the plug, and which engages snugly with the innersurface of the nozzle, so that any vibration or lateral movement of theplug, that would have the efiect of closing some portion of the outlet,is prevented; the plug by this means is kept always in a true centralposition. Said plug is also provided with a transverse opening f, and avertical central opening f leading from the lower extremity of said plugand registering with the opening f. The diameter of the plug as shown atg is less than the portions that engage with the nozzle, the objectbeing to allow desirable space for the gas to circulate in and radiatefrom, as it is discharged through the transverse opening f Alluding nowto another essential feature of this plug;extending from the part g, itwill be noted, is a cone-like or beveled portion h on an incline to theinner sides of the nozzle which acts as a valve to regulate thedischarge of gas through the plug as indicated; this valve can be sominutely adjusted as to allow the discharge of gas to be such only as isnecessary for consumption and that can be properly mixed in the invertedfunnel, with a proper percentage of air without at the same timereducing, uniformly, the entire space between the inclined portion ofthe plug and the straight sides of the nozzle. The discharge, it will beunderstood, is regulated by screwing the plug e with the fingers, intothe nozzle B, which decreases the orifice between the uppercircumference of said nozzle, by bringing the cone or beveled portion h,of the plug, farther into the central opening in the nozzle; byunscrewing the said plug the opposite effect is produced, to-wit, anenlargement of the orifice, and a greater discharge of gas. It has beenfound by practical experimental tests that an article of gas affording aperfect combustion and the greatest amount of heat, is obtainable bygreatly reducing the supply of gas at the mixer.

The operation of my'improvement is as follows: The plug (2 beingadjusted so as to make the opening between the nozzle and the cone hsufficient to supply the requisite amount of gas; the gas iscircumferentially radiated around said cone and flows from the circularopening between the cone and nozzle in a cylindrical column, creating agreater current, and carrying a greater amount of air with it into thefunnel or mixing point, than could be conveyed with a smaller solidstream; ora flow that entered the mixing point through a channel ofuniform size. The effect of my invention is to form the gas into a thinsheet, cylindrical in form, which breaks after it leaves the nozzle ashort distance, and becomes thoroughly mixed with the air, thus insuringperfect mixing of the gas with the greatest amount of air it is possiblefor the gas to mix with, and retain an eificient combustible quality.

Having described my invention, I claim and desire to secure by LettersPatent 1. In a gas mixer, the combination with the inclosing part A, ofthe nozzle B with the annular flange 0 upon which the part A is supported, and a central opening of uniform diameter, the plug 6, providedwith a smooth part or ring on its median portion that retains the widestdiameter of the plug, and an in clined or beveled portion, substantiallyas herein specified.

2. In combination with the part A, the nozzle B provided with an annularflange c to support said part A, and a central opening of uniformdiameter and partially screw threaded, the plug c with external screwthreads to engage with those in the nozzle, an enlarged part or ring onthe median portion of said plug which is adapted to engage with theinner surface of the nozzle and thereby prevent any lateral movement ofthe plug, said plug also having the diameter as at g and the beveledpart as at 71', substantially as herein described.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE J. ROBERTS.

WVitnesses:

R. JAY MOOARTY, WILLIAM B. SULLIVAN.

